A flag indicating whether the current contents of the save path will be
disregarded and potentially overwritten or not. If True, this
will be done. If False, entries in the save path will be read
and new entries will be saved by appending rather than overwriting. (type: bool)

A list of IKnownHostEntry
providers which have been added to this instance in memory but not yet
saved.

_clobber =

A flag indicating whether the current contents of the save path will be
disregarded and potentially overwritten or not. If True, this
will be done. If False, entries in the save path will be read
and new entries will be saved by appending rather than overwriting. (type: bool)

An iterable the elements of which provide IKnownHostEntry.
There is an element for each entry in the file as well as an element for
each added but not yet saved entry. (type: iterable of IKnownHostEntry
providers)